#!amber

# Copyright 2019 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.


# A test for a bug found by GraphicsFuzz.

# Short description: A shader with conditional return inside an infinite loop

# The test passes because the shader always writes the color red.

SHADER vertex variant_vertex_shader PASSTHROUGH

# variant_fragment_shader is derived from the following GLSL:
# #version 310 es
# precision highp float;
#
# layout(location = 0) out vec4 _GLF_color;
#
# layout(set = 0, binding = 0) uniform buf0
# {
#     vec2 injectionSwitch;
# };
#
# int GLF_live6tree[10];
#
# int GLF_live6search()
# {
#     // This function is never accessed
#     int GLF_live6currentNode;
#     int GLF_live6index = 0;
#     while (true)
#     {
#         GLF_live6currentNode = GLF_live6tree[GLF_live6index];
#         if (GLF_live6currentNode != 1)
#         {
#             return 1;
#         }
#         GLF_live6index = 1;
#     }
#     return 1;
# }
#
# void main()
# {
#     if (injectionSwitch.x > 1.0) // Always false
#     {
#         GLF_live6search();
#     }
#     _GLF_color = vec4(1.0, 0.0, 0.0, 1.0);
# }
SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 7
; Bound: 57
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %54
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %8 "GLF_live6search("
               OpName %11 "GLF_live6index"
               OpName %20 "GLF_live6currentNode"
               OpName %25 "GLF_live6tree"
               OpName %40 "buf0"
               OpMemberName %40 0 "injectionSwitch"
               OpName %42 ""
               OpName %54 "_GLF_color"
               OpDecorate %8 RelaxedPrecision
               OpDecorate %11 RelaxedPrecision
               OpDecorate %20 RelaxedPrecision
               OpDecorate %25 RelaxedPrecision
               OpDecorate %26 RelaxedPrecision
               OpDecorate %29 RelaxedPrecision
               OpDecorate %30 RelaxedPrecision
               OpMemberDecorate %40 0 Offset 0
               OpDecorate %40 Block
               OpDecorate %42 DescriptorSet 0
               OpDecorate %42 Binding 0
               OpDecorate %51 RelaxedPrecision
               OpDecorate %54 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeInt 32 1
          %7 = OpTypeFunction %6
         %10 = OpTypePointer Function %6
         %12 = OpConstant %6 0
         %18 = OpTypeBool
         %19 = OpConstantTrue %18
         %21 = OpTypeInt 32 0
         %22 = OpConstant %21 10
         %23 = OpTypeArray %6 %22
         %24 = OpTypePointer Private %23
         %25 = OpVariable %24 Private
         %27 = OpTypePointer Private %6
         %31 = OpConstant %6 1
         %38 = OpTypeFloat 32
         %39 = OpTypeVector %38 2
         %40 = OpTypeStruct %39
         %41 = OpTypePointer Uniform %40
         %42 = OpVariable %41 Uniform
         %43 = OpConstant %21 0
         %44 = OpTypePointer Uniform %38
         %47 = OpConstant %38 1
         %52 = OpTypeVector %38 4
         %53 = OpTypePointer Output %52
         %54 = OpVariable %53 Output
         %55 = OpConstant %38 0
         %56 = OpConstantComposite %52 %47 %55 %55 %47
          %4 = OpFunction %2 None %3
          %5 = OpLabel
         %45 = OpAccessChain %44 %42 %12 %43
         %46 = OpLoad %38 %45
         %48 = OpFOrdGreaterThan %18 %46 %47
               OpSelectionMerge %50 None
               OpBranchConditional %48 %49 %50
         %49 = OpLabel
         %51 = OpFunctionCall %6 %8
               OpBranch %50
         %50 = OpLabel
               OpStore %54 %56
               OpReturn
               OpFunctionEnd
          %8 = OpFunction %6 None %7
          %9 = OpLabel
         %11 = OpVariable %10 Function
         %20 = OpVariable %10 Function
               OpStore %11 %12
               OpBranch %13
         %13 = OpLabel
               OpLoopMerge %15 %16 None
               OpBranch %17
         %17 = OpLabel
               OpBranchConditional %19 %14 %15
         %14 = OpLabel
         %26 = OpLoad %6 %11
         %28 = OpAccessChain %27 %25 %26
         %29 = OpLoad %6 %28
               OpStore %20 %29
         %30 = OpLoad %6 %20
         %32 = OpINotEqual %18 %30 %31
               OpSelectionMerge %34 None
               OpBranchConditional %32 %33 %34
         %33 = OpLabel
               OpReturnValue %31
         %34 = OpLabel
               OpStore %11 %31
               OpBranch %16
         %16 = OpLabel
               OpBranch %13
         %15 = OpLabel
               OpReturnValue %31
               OpFunctionEnd
END

# uniforms for variant

# injectionSwitch
BUFFER variant_injectionSwitch DATA_TYPE vec2<float> DATA
 0.0 1.0
END

BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM

PIPELINE graphics variant_pipeline
  ATTACH variant_vertex_shader
  ATTACH variant_fragment_shader
  FRAMEBUFFER_SIZE 256 256
  BIND BUFFER variant_framebuffer AS color LOCATION 0
  BIND BUFFER variant_injectionSwitch AS uniform DESCRIPTOR_SET 0 BINDING 0
END
CLEAR_COLOR variant_pipeline 0 0 0 255

CLEAR variant_pipeline
RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256

EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255